At the beginning of the thermal power plant, all the water quality indicators had to be manually tested, and the manual test had a large error and timeliness, and could not reflect the changes in the water quality indicators at the first time, which also led to the safe operation of the thermal power plant could not be guaranteed. As a result, a lot of ** meters have been produced. **The sodium meter is a device for monitoring the quality of condensate and steam in power plants, through which we can detect changes in water quality at the first time, such as condenser leaks, sodium leaks in the polishing system, and deterioration of steam quality.
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*The sodium meter uses a glass sodium electrode to measure the water quality index, and the electrode reacts with sodium ions to produce a weak voltage signal. This kind of instrument, in operation, to overcome the seepage of its own electrode elements, and the change of water quality pH value will also interfere, let's take a look at the factors that affect the indication value.
1.The concentration of sodium ions, there are several influencing indicators, one is the number of sodium ions in the water, and the other is the number of sodium ions involved in the reaction, also called activity, the two are linearly related, the closer the value, the better. The last one is the strength of the sodium ion, which will affect the accuracy of the numerical indication.
2.The alkalizing agent used in the sodium table should be injected or used to avoid secondary pollution, and in principle, the smaller the degree of alkalizing agent pollution, the better the indication. Efficient alkalizing agents must be done well from the source or from the control. At the same time, it should be noted that the change of pH value of the water sample should meet the requirements.
3.The influence of other factors, sodium electrode, reference electrode, ions in water, pH value, etc., will change the results, so we should pay more attention to the changes of various ions in the water sample, and pay attention to the mutual influence between various ions when selecting products, and try not to interfere with each other.
* Sodium meter is also a precision water quality measuring instrument, when we use and maintain, we must follow the manufacturer's instructions, do not change the data or indicators by yourself, so as not to cause distortion of water quality indicators, if necessary, you can manually test to determine the correctness of the index concentration.
Thermal power plants